|Publication number||US8063838 B1|
|Application number||US 12/383,082|
|Publication date||Nov 22, 2011|
|Filing date||Mar 13, 2009|
|Priority date||Mar 13, 2009|
|Publication number||12383082, 383082, US 8063838 B1, US 8063838B1, US-B1-8063838, US8063838 B1, US8063838B1|
|Inventors||David A. Tonn|
|Original Assignee||The United States Of America As Represented By The Secretary Of The Navy|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Non-Patent Citations (5), Referenced by (1), Classifications (5), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefore.
(1) Field of the Invention
The present invention relates to a submarine mast antenna system and more particularly, to a control device for controlling the submarine antennas, monitoring a variety of sensors and providing control signals to electromechanical devices.
(2) Description of the Prior Art
Typically, a submarine has an antenna mast proximate but outside its pressure hull. The antenna mast has several antennas mounted thereon. Numerous electromechanical components such as servomotors and relays are positioned inside the antenna mast. Currently, the antennas have antenna control units (ACUs) for electromechanical control of tuning, pre-amplification, and band selection settings. An electromechanical synchro-resolver, light bulb, or other indicator is positioned inside the submarine to monitor and provide feedback for the antenna and components mounted in the antenna mast. This ACU is a bulky, expensive, and heavy electromechanical device that requires manual activation of buttons and switches to operate it.
There is a need for a device and system that consolidates the indicators and manual activation buttons and switches of the ACU to a single computer terminal. Further, there is a need for a device and system that controls the various functions of the antenna mast components. Finally, there is a need for a solid-state electronic control unit that has improved functionality and is simpler to use.
Accordingly, the present invention is a submarine mast antenna controller. The submarine mast antenna controller is a solid state electronic control unit on a single card that monitors various submarine mast antenna system sensors and motors, and controls electromechanical devices associated with the sensors and improves functionality over the former ACU system by consolidating control interfaces and indicators in one computer terminal via a VXI interface. In order for the submarine mast antenna controller to function properly, electromagnetic interference between the mast and the VXI interface must be kept to a minimum by isolating the mast electrical ground from the submarine mast antenna controller chassis ground.
These and other features and advantages of the present invention will be better understood in view of the following description of the invention taken together with the drawings wherein:
A block diagram of an antenna system 10 for use on a submarine (not shown) is illustrated in
The mast indicator read back 24 is further divided into two functional sections: the digital read back circuit 28 reads back digital indicators and analog read back circuit 30 reads back analog indicators. In the preferred embodiment there are three digital (boolean) indicator lines that are read back and six analog indicator lines that are read back originating from the antenna system 10. The digital and analog indicator signals proceed from P3 and P4. To avoid having the return line on the antenna system 10 connect to the submarine's electrical ground, in order to avoid electromagnetic interference problems, all of the indicator lines coming from the antenna system 10 (both digital and analog) are electrically isolated from submarine's electrical ground. This is accomplished by means of isolator circuits. The submarine mast antenna controller 16 uses an optical isolation network comprised of photo emitting and photo-detector integrated circuits that are described below.
The analog indicator signals are read back via a 12-bit scanning analog-to-digital (A to D) converter 36 as shown in the analog read back circuit 30 in
The A to D converter 36 draws power from a power isolation circuit 50 that comprises a DC-to-DC converter (and their supporting filters). The A to D converter 36 works off the free-running 650 Hz clock 40 signal, which drives counter 42.
Both the 12-bit digital output from the A to D converter 36 and the 6-bit digital output from register selector 48 are electrically isolated via the optical isolator 52. Referring now to
The 12-bit digital output is then passed to the appropriate tri-state register (1-6), which is preferably a 74LS374s register. The register selector 48 controls and determines which register (1-6) the 12-bit digital output is passed to. The scanning A to D converter 36 may be used with additional registers to read up to 16 analog signals. The registers (1-6) are operatively connected to receive data from the optically isolated A to D Converter 36 12-bit digital output when the register is activated by the register selector 48 signal for that register (1-6). Multiple registers (1-6) may be joined to receive portions of the optically isolated A to D Converter 36 digital output. The registers 1-6 make the status signal from each component available to the VXI interface 26.
The third functional section of the submarine mast antenna controller 16, the VXI interface 26, is illustrated in
The VXI interface 16 connects to a computer terminal 18 across a VXI bus 20 and using a VXI protocol receives as inputs the series of TTL logic control and indicator lines that contain the control and indicator signals from the Mast Function Control 22 and the Mast Read Back 24. The control and indicator signals are passed to the computer terminal 18 where a user interface 23 gives access to all of the control functions and indicators to a user.
Modifications and substitutions by one of ordinary skill in the art are considered to be within the scope of the present invention, which is not to be limited except by the following claims.
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|1||*||Avago Technologies. Optoisolation Products. Selection Catalog. Feb. 2, 2007.|
|2||*||Lockheed Martin. Buoyant Wire Antenna System. 2006.|
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|Citing Patent||Filing date||Publication date||Applicant||Title|
|US20150339252 *||May 20, 2015||Nov 26, 2015||Bosch Automotive Service Solutions Inc.||Embedded Extensible Instrumentation Bus|
|U.S. Classification||343/709, 710/1|
|Apr 13, 2009||AS||Assignment|
Owner name: UNITED STATES OF AMERICA, THE, RHODE ISLAND
Free format text: CONFIRMATORY LICENSE;ASSIGNOR:TONN, DAVID A.;REEL/FRAME:022517/0634
Effective date: 20090312
|Jul 2, 2015||REMI||Maintenance fee reminder mailed|
|Aug 28, 2015||FPAY||Fee payment|
Year of fee payment: 4
|Aug 28, 2015||SULP||Surcharge for late payment|